Abstract: An electronic device (220) includes a component (105), such as a microprocessor, that generates heat and an electrochemical capacitor (200) used for thermal management. The electrochemical capacitor (200) has a first region, preferably the perimeter region, including electroactive material (160) and an electrolyte (165) and also has a second region, preferably the inner region, including heat sink material (170). When the component (105) and the electrochemical capacitor (200) are mounted within the device (220), the heat sink material (170) of the capacitor (200) is aligned with the component (105).

Abstract: An electrochemical cell is provided with first and second electrodes, and a solid polymer electrolyte disposed therebetween. The electrodes may either be of the same or different materials and may be fabricated from ruthenium, iridium, cobalt, tungsten, vanadium, iron, molybdenum, halfnium, nickel, silver, zinc, and combinations thereof. The solid polymer electrolyte is in intimate contact with both the anode and the cathode, and is made from a polymeric support structure having dispersed therein an electrolyte active species. The polymer support structure is preferably a multi-layered support structure in which at least a first layer is fabricated of a polybenzimidazole, and at least a second layer is fabricated of, for example, poly vinyl alcohol.

Abstract: High power density electrochemical capacitors may be pretreated by immersing the electrodes therefore in an alkaline solution. Thereafter the immersed electrode are subjected to high power pulses for brief periods of time. The pretreatment process forms an activated oxide layer on the electrode surface. The resulting device is capable of delivering high current pulses with enhanced discharge voltage.